1
Features
COIL +
Q
1
COIL -
V
SS
ENABLE1
ENABLE2
DIRECTION
Gnd
DRIVE
CONTROL
LOGIC
OUTPUT
DRIVER
OUTPUT
DRIVER
+
OUTPUT
DRIVER
+
Overvoltage
Protection
Transient
Protection
V
REF
Over
Current
Protection
Q
3
Q
4
Q
2
Over
Current
Protection
s
High Current (2A typ)
Output
s
TTL compatible
DIRECTION Control
s
Fault Protection
Overvoltage
Load Dump Protection to
74V
Package Options
7 Lead Power SIP
CS3720
2A H-Bridge Driver
Description
Block Diagram
The CS3720 is high current (2A typ)
bidirectional DC motor driver. The
H-bridge output stage consists of
two pairs of power NPN transis-
tors, each with a V
SAT
=2.3V at
I
OUT
=2A (typ).
The three TTL compatible inputs,
ENABLE1, ENABLE2, and DIREC-
TION control the output stage.
When ENABLE1 is low and
ENABLE2 is high, DIRECTION
determines which way current
flows through the motor coil. Any
other combination of ENABLE set-
tings disables the outputs.
The CS3720 is protected against
overvoltage fault conditions. If a
fault condition is detected, the IC
shuts down.
CS3720
2
ENABLE1
4
DIRECTION
6
COIL+
8
Gnd
10 COIL
12 V
SS
14 ENABLE2
Absolute Maximum Ratings
DC Input Voltage ..................................................................................-0.3 to 28V
Transient Input Voltage ...................................................................... -0.3 to 74V
Internal Power Dissipation......................................................Internally limited
Junction Temperature Range .....................................................-40C to +150C
Storage Temperature Range.......................................................-65C to +150C
Lead Temperature Soldering
Wave Solder (through hole styles only) ............10 sec. max, 260C peak
Reflow (SMD styles only) .............60 sec. max above 183C, 230C peak
Electrostatic Discharge (Human Body Model).............................................2kV
1
7 Lead TO-220
7 Lead D
2
PAK
1
1
ENABLE1
2
DIRECTION
3
COIL+
4
Gnd
5
V
SS
6
COIL
7
ENABLE2
Rev. 5/4/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A Company
2
Current flow through the two outputs COIL+ and COIL-
is controlled by the combined settings of ENABLE1,
ENABLE2 and DIRECTION (Table 1). The outputs will be
active only when ENABLE1 is low and ENABLE2 is high.
When DIRECTION is high, current flows out of COIL+
and into COIL-. When DIRECTION is low, current flows
out of COIL- and into COIL+. For any other combination
of ENABLE settings, the outputs are off.
Table 1. Logical Control Diagram
ENABLE1 ENABLE2
DIRECTION
COIL+
COIL-
Low
High
High
High
Low
Low
High
Low
Low
High
High
X
X
OFF
OFF
X
Low
X
OFF
OFF
Motor Direction Control
Electrical Characteristics: 5.5V V
CC
17V; 40C T
J
+150C; 40C T
C
+105C; 40C T
A
105C; unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CS3720
Package Lead Description
PACKAGE LEAD#
LEAD SYMBOL
FUNCTION
Application Hints
15 Lead
7 Lead
7 Lead
Power SIP
TO-220
D
2
PAK
2
1
1
ENABLE1
Enables output when held low and ENABLE 2 = High
4
2
2
DIRECTION
Determines the direction of current flow through COIL+ and
COIL- as long as ENABLE1 = Low and ENABLE2 = High
6
3
3
COIL+
Positive Output of H bridge to coil
8
4
4
Gnd
Ground connection
12
5
5
V
SS
Supply voltage for IC
10
6
6
COIL-
Negative Output of H bridge to coil
14
7
7
ENABLE2
Enables output when held high and ENABLE 1 = Low
s
Output Stage
Quiescent Current
I
OUT
=0mA;
10
mA
ENABLE1=DIRECTION= High
ENABLE2=Low
Output Saturation Voltage
I
OUT
=2A
3.2
V
I
OUT
=500mA
2.6
V
Output Leakage Current
I
OUT
=0mA
20
A
Current Limit
3.0
A
s
Logic Control Functions
High Level Input Voltage
2.0
V
Low Level Input Voltage
0.8
V
High Level Input Current
10
A
Low Level Input Current
-250
A
Turn on Delay
R
LOAD
=30; Coil=5mH;
50
s
Guaranteed by design
C
LOAD
=15pF
5
Turn off Delay
R
LOAD
=30; Coil=5mH;
50
s
Guaranteed by design
C
LOAD
=15pF
5
s
Fault Protection Functions
Overvoltage Shutdown
I
OUT
= 500mA
18.0
21.5
V
3
CS3720
Application and Test Diagram
mP
I/O
V
S S
V
SS
L
LOAD
5mH
R
LOAD
30
W
C
LOAD
0.1
mF
D
1
D
1
= IN4001
or equivalent
COIL -
COIL +
ENABLE1
ENABLE2
DIRECTION
Gnd
CS3720
V
SS
D
1
D
1
D
1
ENABLE2 = 2.4V
ENABLE1
DIRECTION
COIL+
COIL
ENABLE2
DIRECTION
COIL+
COIL
5V
0V
5V
0V
17V
0V
17V
0V
5V
0V
17V
0V
17V
0V
5V
0V
50%
50%
10%
90%
50
ms
Turnoff
Delay
50
ms
Turnoff
Delay
ENABLE1 = 0.4V
50%
50%
10%
90%
Figure 1. Delay Times for ENABLE and COIL
Note: A heatsink is required for 2A operation.
Part Number
Description
CS3720XT7
7 Lead TO-220 Straight
CS3720XTVA7
7 Lead TO-220 Vertical
CS3720XTHA7
7 Lead TO-220 Horizontal
CS3720XM7
7 Lead Power SIP Straight
CS3720XDPS7
7 Lead D
2
PAK Short-Leaded
CS3720XDPSR7
7 Lead D
2
PAK Short-Leaded
(tape & reel)
4
7L
7L
7L
Thermal Data
D
2
PAK TO-220
Power SIP
R
QJC
typ
2.1
2.1
2.1
C/W
R
QJA
typ
10-50*
50
35
C/W
*Depending on thermal properties of substrate. R
QJA
=R
QJC
+R
QCA.
Package Specification
Ordering Information
PACKAGE THERMAL DATA
Rev. 5/4/99
CS3720
1999 Cherry Semiconductor Corporation
Cherry Semiconductor Corporation reserves the
right to make changes to the specifications without
notice. Please contact Cherry Semiconductor
Corporation for the latest available information.
PACKAGE DIMENSIONS IN mm (INCHES)
7 Lead TO-220 (T) Straight
2.87 (.113)
2.62 (.103)
9.78 (.385)
10.54 (.415)
1.40 (.055)
1.14 (.045)
0.64 (.025)
0.38 (.015)
0.56 (.022)
0.36 (.014)
1.40 (.055)
1.14 (.045)
4.83 (.190)
4.06 (.160)
14.22 (.560)
13.72 (.540)
0.94 (.037)
0.58 (.023)
7.75 (.305)
7.49 (.295)
2.92 (.115)
2.29 (.090)
3.71 (.146)
3.96 (.156)
14.99 (.590)
14.22 (.560)
6.55 (.258)
5.94 (.234)
7 Lead Power SIP (M) Straight
20.02 (.788)
15.24 (.600)
17.50 (.689)
10.69 (.421)
0.79 (.031)
MAX.
10.9 (.429)
1.1 (.043)
2.54 (.100)
7 Lead D
2
PAK (DPS)* Short-Leaded
1.98 (.078)
1.47 (.058)
14.71 (.579)
13.69 (.539)
4.57 (.180)
4.31 (.170)
1.40 (.055)
1.14 (.045)
2.79 (.110)
2.54 (.100)
TERMINAL 8
7.75 (.305)
REF
6.50 (.256) REF
10.31 (.406)
10.05 (.396)
1.27 (.050)
REF
1.68 (.066)
1.40 (.055)
.254 (.010)
REF
0.91 (.036)
0.66 (.026)
8.53 (.336)
8.28 (.326)
0.10 (.004)
0.00 (.000)
*CHERRY SEMICONDUCTOR SHORT-LEADED FOOTPRINT
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